Methods of holistically diffusing carbon dioxide within a concrete mixture

A method of diffusing CO2 within a concrete mixture, the method comprising:

• mixing a non-recycled aggregate material with a CO2 gas in a pretreatment chamber of a concrete preparation system to form a CO2 adsorbed aggregate material;
• transferring the CO2 adsorbed aggregate material from the pretreatment chamber into a cement mixing chamber of the concrete preparation system;
• and
• mixing the CO2 adsorbed aggregate material with cement and water to form the concrete mixture, wherein mixing the CO2 adsorbed aggregate material with cement and water releases CO2 from the CO2 adsorbed aggregate material and diffuses CO2 into the concrete mixture to form a carbonated concrete mixture, wherein the concrete preparation system further comprises a CO2 source coupled to the pretreatment chamber by a CO2 input pipe and wherein the concrete preparation system further comprises an upstream flowmeter fluidly coupled to the CO2 input pipe and configured to measure the flow rate of CO2 gas entering the pretreatment chamber.

A method of diffusing CO2 within a concrete mixture, the method comprising:

• mixing a non-recycled aggregate material with a CO2 gas in a pretreatment chamber of a concrete preparation system to form a CO2 adsorbed aggregate material;
• transferring the CO2 adsorbed aggregate material from the pretreatment chamber into a cement mixing chamber of the concrete preparation system;
• and
• mixing the CO2 adsorbed aggregate material with cement and water to form the concrete mixture, wherein mixing the CO2 adsorbed aggregate material with cement and water releases CO2 from the CO2 adsorbed aggregate material and diffuses CO2 into the concrete mixture to form a carbonated concrete mixture, wherein the concrete preparation system further comprises a CO2 source coupled to the pretreatment chamber by a CO2 input pipe and, wherein the CO2 gas is directed from the CO2 source into the pretreatment chamber at a flow rate of from 300 ml/min to 1400 ml/min.

A method of diffusing CO2 within a concrete mixture, the method comprising:

• mixing a non-recycled aggregate material with a CO2 gas in a pretreatment chamber of a concrete preparation system to form a CO2 adsorbed aggregate material;
• transferring the CO2 adsorbed aggregate material from the pretreatment chamber into a cement mixing chamber of the concrete preparation system;
• and
• mixing the CO2 adsorbed aggregate material with cement and water to form the concrete mixture, wherein mixing the CO2 adsorbed aggregate material with cement and water releases CO2 from the CO2 adsorbed aggregate material and diffuses CO2 into the concrete mixture to form a carbonated concrete mixture, wherein:
• the concrete preparation system further comprises a cement source coupled to the cement mixing chamber by a cement input pipe and a water source coupled to the cement mixing chamber by a water input pipe;
• and
• mixing the CO2 adsorbed aggregate material with the cement and the water in the cement mixing chamber comprises:
• directing the cement from the cement source into the cement mixing chamber;
• and
• directing the water from the water source into the cement mixing chamber.

A method of diffusing CO2 within a concrete mixture, the method comprising:

• mixing a non-recycled aggregate material comprising a pozzolan material with a CO2 gas in a pretreatment chamber of a concrete preparation system to form a CO2 adsorbed aggregate material;
• transferring the CO2 adsorbed aggregate material from the pretreatment chamber into a cement mixing chamber of the concrete preparation system through a chamber connection pipe;
• and
• mixing the CO2 adsorbed aggregate material with cement and water to form the concrete mixture, wherein mixing the CO2 adsorbed aggregate material with cement and water releases CO2 from the CO2 adsorbed aggregate material and diffuses CO2 into the concrete mixture to form a carbonated concrete mixture comprising a distribution of carbon that varies by 10% or less throughout the volume of the carbonated concrete mixture.